Socket



Dec. 27, 19,27.

E. J. NIELSEN SOCKET Filed Sept. 22. 1922 illlllllmn Fmi ZJZ'EZSEZ? Patented Dec. 27, 1927.

UNITED STATES PATENT: orifice.

EMIL J". NIELSEN, OAK PARK, ILLNQS, ASSGNOR TO KELLQGG SWTCI-IBOABD AND SUPPLY GGMPANY, OF CHICAGO, LLINOIS, A GORPORATIN DF ILLNOIS.

Application filed September 22, 1922. Sera). No. 589,766.

My invention relates to sockets, and has to do more particularly with sockets suoli as are used for radio Work lor holding any standard tom-prong base vacuum tubes. The vaculun tube, in. addition to these tour prongs, is provided lwith a pin secured to the side oil? the tube base and is adapted to be inserted into a bayonet slot for holding the tube against disililacement, and at the saine timehold the prongs ci the tube in engagement `with the terminal springs. The majority ot sockets now in use are constructed of any suitable moulded insulated compound, and it has been foundthat a certain degree of care must be exercised when inserting or removing the tube that no undue pressure or pull is applied to the tube, as there is a liability that the Wall of the socket around the bayonet slot will be cracked or broken, and thus render the socket useless. Theretore, the main object ci my invention is the provision of a socket which Will overcome this objectionable feature and fprovide an improved tube socket structure, and oneof theteatures of my invention is the provision ot a suitable metal insert which is moulded in the Wall of the tube socket to reinforce the portion of the Wall that contains the bayonet slot to prevent breakage.

Another feature of my' invention is the provision of novel anchoringl means for anchoring the metal insert in the Wall of the tube socket against displacement. i

For a more complete understanding` of my invention, reference may be had to the accompanying drawing, in which like reference characters in the several views denote like parts, and in which Fig. 1 is an elevation of the tube socket otl my invention;

2 is a plan vieuT ot Fig. 1

Fig. 3 is a sectional view along the line 3-3 of Fig. 1, illustrating the method in which the metal reinforcing insert isr em-` bedded in `the `Wall of the socket;

Fig. l is a sectional View along the line 4.44 of Fig. 1, illustrating the metal .reinit'orcing insert in position; and y F ig. 5 is a perspective View of the metal reinforcing insert.

Referring now more in detail tomy improved `tube socket, it comprises a suitable base 2 moulded of a suitable'insulating compound. such as bakelite or redmanol. The base 2 is provided with integrally `formed lugs 3 and 4l, the lugs 3 being providedwith suitable orifices through which screws 5 extend to secure the spring terminals 6 which `engage the prongs ot' ay vacuum tube 'when in position to the base 2.V Nuts 7 andlock nuts 8 secure thelscrew against movement,

and knurled nuts 9 having screw-threaded engagement with; the screws 5 form terminals `The base has integrally formed 'therewith an upwardly extending `cylindrical socket Wall 10, Whose opening 11 is of a sizeto tit any standard vacuum tube. The metal reinforcing insert or plate 12 is rectangular in shape and is constructed ot thin metal such as brass, about one-half the thickness oit the socket Wall 10, and arcuately formed so as to conform with the inner circumferential surtace 130i the socket Walkk The metalplate 12 is providedwvith a bayonet. slot let anda plurality of oriiices 15, and a pair ofintegrally termed tongues 16 shaped by means of a suitable shearing operation, for purposes Will now be described. Suitable presses are provided for moulding compounds suchy as bakelite or redmanol, and the moulds which are used are of the usual multiple type which are associated with the press. The inserts or plates 12 which are moulded into the socket of my invention are inserted into the moulds by means ol" a suitable Xture or tool, and when in position, the compound is poured in and the `press operated to cause the socket to be moulded. The tongues 16 which are formed to extend outward from the plane oit the insert or plate 12 extend into the moulded compound, and the opening 17 which is formed by the shearingof the tongues 16 permits the compound to flow into the said openings 17. A The compound also enters the orifices 15 in the insert 19., and from the above description it may readily be seen that the tongues 16 imbed themselves in `the moulded compound, which is clearly illustrated in Fig. 3, and anchors the insert or plate 12 in position against disliilacement, and the openings 15, which are also 'filled with the moulded compound, form an additional anchoringmeans to prevent any side.

Wise movement ofthe insert 12. The verti! cal portion 18 of the slot in the Wall 10` `of the socket is formed lduring the moulding operationof the saine, and by means ol a suitable drilling operation the horizontal portion 19 is drilled through the Wall 10 of the socket to conform with the horizontal portion of the bayonet slot 1stl in.. the metal insert 12.

From thedetailed description just given, it may readily beseen that the metal reinforcing insertor, plate 12 provides a simple:

construction which.eliminates` the liability of breaking the Wall 10 around the` bayonet slot ofthe socket, and also provides a post tive means orholding the insert l2 in place, the .combination producing an improved tube socket with a reinforced bayonet slot which may be` used moreorless roughly Without the danger of breakage, as was `formerly the case. i c

Vllhile Ihave illustrated and described a particular embodiment of my invention, it is `to be.understoodthat Ido not desi-re to be limited to the exact structure which is here in described and illustrated, `but intend to cover-,all sucli changes and modifications as come Within tlieispirit and scope of the ap pended claims.

hat I claim as new and desire to secure byUnitedStates Letters Patent, is:

1. In a moulded tube socket otlthe class described including a cylindrical member` metal plate arcuately formed` and set in said member during ythe moulding ot said socket to forma portion of the inner wall of the same,

and apairof angularly displaced tongues in-4 tegrally formed with: saidA plate extending into said membei` for anchoring said plate in said member.

3.I1i. a moulded tube socket of the` class ldescribechincluding a cylindrical member for `receiving a lamp, a rectangular shaped met-alplate arcuately formed andi set insaidA member during the, moulding Voi said socket to formr a` portionyof `the inner Wall of the saine, a bayonet slot in said plate, a` pair of 1 angulaifly `displaced tongues. integrally formed .with said plate extending into' said member Jfor anchoring saidlplate in said meinbernand a bayonet slot cut in said member to contorni with said bayonet slot in saidwplate to torni holding nieansior a lamp `when litted in said tube.

4c. A moulded tube socket of the class de scribed including a cylindrical .n'iei'iiljeig a. rectangular shaped metal plate arcuately formed and moulded in said member to forni a portion of the inner wall of the saine,

plateuarcuately formed and placed in posi` tion in said member during the inouldinrti;` operation oi said socketto toi-m a portion of the iinieitwall ofthe saine, a pair of an gularly displaced tongues for said plate in tegrally formed therewith embedded in `said member, `and orifices in said plate into which said moulded material is pressed,` said tongues` and orifices of? said plate securing said plate` fis an insert in said memberV against displacement.

6. In. a tubesocket of the classdescribed,

. constructedof suitable mouldedinsulating material, including a cylindricalmember for receiving a tube, a rectangular shaped plate arcuately formed and placed in position in said member during the moulding operation of said socket to form a portion oi" the inner wall of theA saine, a` pair of angularly dis` placed tongues for said plate integrally formed therewith enibeddcd in said member, orifices in said plate `into which said moulded material is pressed, said tongues and orifices of said plate securing said plate as an insert in said member againstI displacement, and aligned bayonet slots in said vinember and` plate, said plate forming rcinti'ircing means for said slot in said member.`

7. A moulded tube socket oi the; class de scribed including a cylin'lricaliiiieinber, an opening provided in the wall oli said cylindrical member, and a incn'iber, cori sponding to the contour of said cylindrical incur ber forming a portion of the inner wall of the same andliaving an openingto conform With said rst'opeiiing, moulded in said cylindrical member to` reinforce said first opening, said reinforcing member being provided with orifices i and projections cci-operating With the said "cylindricaln'ieinber to hold Vsaid reinforcing member iiilposition".

8. A moulded tube .socket of theclass described .including a cylindrical member `liar-` ing a slot formed therein, and a metal insert forming a portion of the innerwall otl said cylindrical member and having a slot con-` `tongues `integrally :i'oin'ied with said plate Dfi lll!

forming to said lirst slot, moulded `in said cylindrical member so that said slots coincide, said metal insert having orilices and projections eo-operating With said cylindrical member to secure said insert in position.

9. A moulded tube socket including a cylindrical member provided with a slot, and a. metal insert, having a corresponding slot, moulded in said member so that said slots coincide, said metal insert forming a portion of the inner Wall of said cylindrical member, and means including projections and openings integrally formed with said metal insert for preventing displacement oil said metal insert. o

l0. A receptacle socket of insulating inaterial provided with a recess forming fastening means, and a metallic reinforcing member forming a portion of the inner wall of said receptacle socket and provided with means including ears and orifices to firmly secure the same to said insulating material and having a recess similar to the sai-d recess in said insulating' material.

1l. A socket including a body having a bayonet slot, a rectangular reenforcing member having outwardly efxtending tongues thereon molded in said body, said member having portions out away to coincide With the bayonet slot whereby said portions form a bearing surface for a pin inserted in said slot.

Signed by me at Chicago, in the county of Cook and State of Illinois, this 18th day of September, 1922.

EMIL J. NIELSEN. 

